Rainier Arms Match Series 6MM Creedmoor AR-10 Threaded Barrel 18 inch Rifle Length 1-8 Twist 5/8 X 24 Fluted Silver Medium. We start off using a high precision match blank in 1:8 twist machine it to the highest quality and matched with our limited-life time warranty. You have a barrel that is the best value hands down in the industry. Guarantee sub-MOA with factory match ammunition. Our Craftsmanship Rainier barrels are meticulously designed and machined by precision gunsmiths. Our barrels are turned the same way true artisans have made premium rifle barrels for over a century. Each barrel has hand-cut chambers and crowns with the attention to detail that can only come from highly trained human intervention. While most companies strive for faster production time to cut costs we strive for perfection. There are no shortcuts with our barrels period. We will go toe to toe with anyone and win. Specifications for Rainier Arms Match Series 6MM Creedmoor AR-10 Threaded Barrel: Manufacturer: Rainier Arms Fabric/Material: Stainless Steel Caliber: 6mm Creedmoor Gas System Length: Rifle Length Gas Block Journal Size-Diameter: .875 in Threads per Inch: 5/8x24 Barrel Twist Rate: 1-8 Barrel Material: Stainless Steel Gun Make: AR Platform Gun Model: AR-10 Package Contents: Rainier Arms Match Series 6MM Creedmoor AR-10 Threaded Barrel What firearm models does the manufacturer say Rainier Arms Match Series 6MM Creedmoor AR-10 Threaded Barrel is compatible with? The manufacturer suggests that Rainier Arms Match Series 6MM Creedmoor AR-10 Threaded Barrel is compatible with AR-10Rainier Arms RAB-M-6CM-18-R-FF: Match Series 6MM Creedmoor AR-10 Threaded Barrel 18 inch Rifle Length 1-8 Twist 5/8 X 24 Fluted Silver Medium